WASHINGTON, May 7 /PRNewswire-FirstCall/ -- XM Satellite Radio (NASDAQ: XMSR) has scheduled a conference call for Monday, May 12, 2008, at 10:00 a.m. ET to announce and discuss its first quarter 2008 financial results. Prior to the call, XM Radio's first quarter 2008 results will be posted to the Company's Web site at http://www.xmradio.com/ and released to PR Newswire and First Call.

The conference call can also be accessed through a live webcast on the Company's Web site at http://www.xmradio.com/ (click on "Investor Info" link at the bottom of the page). The webcast of the call will also be archived on the Company's Web site.

If you are unable to participate in the scheduled call, a replay of the conference call will be available after 11:30 a.m. ET on Monday, May 12, 2008 until August 12, 2008.

XM is America's number one satellite radio company with more than 9 million subscribers. Broadcasting live daily from studios in Washington, DC, New York City, Chicago, Nashville, Toronto and Montreal, XM's 2008 lineup includes more than 170 digital channels of choice from coast to coast: commercial-free music, premier sports, news, talk radio, comedy, children's and entertainment programming; and the most advanced traffic and weather information.

XM, the leader in satellite-delivered entertainment and data services for the automobile market through partnerships with General Motors, Honda, Hyundai, Nissan, Porsche, Ferrari, Subaru, Suzuki and Toyota is available in 140 different vehicle models for 2008. XM's industry-leading products are available at consumer electronics retailers nationwide. XM programming is also available through XM Radio Online, the exclusive home on the Internet for XM's commercial-free music channels; as downloads of original XM shows via podcasts from XM's Web site or the Apple's iTunes Store; and as streams of commercial-free XM music channels to AT&T and Alltel wireless customers through XM Radio Mobile. For more information about XM hardware, programming and partnerships, please visit http://www.xmradio.com/.

Factors that could cause actual results to differ materially from those in the forward-looking statements in this press release include demand for XM Satellite Radio's service, the Company's dependence on technology and third party vendors, its potential need for additional financing, as well as other risks described in XM Satellite Radio Holdings Inc.'s Form 10-K filed with the Securities and Exchange Commission on 2-28-08. Copies of the filing are available upon request from XM Radio's Investor Relations Department. All programming subject to change.